Trolley-wheel



(No Model.)

A. P. HUMPHREY.

TROLLBY WHEEL.

No. 605,716; Patented Jul 18 14, 1898.

WITNESSES: IIVI/E/I/TOR d W By 6 M Arm/my.

UNITED STATES PATENT OFFICE.

ALEXANDER F. HUMPHREY, OF ALLEGHENY, PENNSYLVANIA.

TROLLEY-WHEEL.

SPECIFICATION forming part of Letters Patent No. 605,716, dated June 14, 1898. Application fil ed December 9,1897. Serial No. 661,262. (No model.)

- therein to the accompanying drawings.

This invention relates to certain new and useful improvements in trolleys, and has for,

vented from accidental displacement therefrom.

The principal features of my invention re side in the two spring-actuated arms which extend over the trolley-wheel and prevent the wheel from leaving the wire, together with novel means for retracting these arms to permit the removal of the wheel from the wire when it is so desired, and in the novel construction whereby the trolley is permitted to pass safely over the switch arranged'at the crossing of two lines of current-wires;

The invention finally consists in the novel construction, combination, and arrangement of parts to be hereinafter more specifically described, and particularly pointed out in the claim;

In describing the invention in detail reference is had to the accompanying drawings, forming a part of this specification, and wherein like letters of reference indicate similar parts throughout the several views,in which Figure 1 is a perspective view of my improved trolley, together with a similar view of a switch provided at the two crossing lines. Fig. 2 is a rear elevation of the trolley. Fig. 3 is a side view of the same. Fig. 4 is a side View of a portion of the fork, showing the inclined face of one of the jaws: within which the spring-actuated arms are pivoted.

Referring now to the drawings by referenceletters, a. indicates the fork, which is formed on or rigidly'secured to a suitable ferrule b,

, that is attached to the upper end of the trolley-pole c. WVithin the two prongs forming the fork is journaled the axle or shaft d, on

which is mounted a suitable trolley-wheel e,

- the trolley-wheel coil-springs f, which retain the trolley-Wheel normally on the center of I the shaft, but permit of its lateral movement within the fork. The upper ends of the prongs forming the fork are formed into frames a, extending'rearwardly and forwardly of the said prongs. The forward extensions of said prongs are provided with jaws a in which are pivotally secured the arms I), which extend inwardly between'the two prongs and carry small rollers or wheels 5 in their inner ends, which engage each other and close the opening through which the wire is passed when placing the trolley in position thereon. These arms are held in the closed position by means of stiff-coil-springs 0, attached to the rear face of the same and to the inner face of the rearwardly-extending portion of the frame a. a

For the purpose of guiding the trolley under a switchprovided at crossings I have formed cut-awayportions or recesses (if in the rearwardly-extending portions of the'frame a and have journaled to the said portions within these recesses a small roller or wheel d which projects slightly above the edge of the frame a. The switch or crossing g provided at the intersection of the two lines is passed by arranging wings h on the upper face of the wire, which come in contact with the rollers 19 and open the arms 5 previous to their reaching the switch g, while at the same time a wing h, having an inclined face It and which is arranged on the underneath side of the wire, engages upon the trolley-' wheel, so as to depress the same and permit the trolley to ride in under the switch g, where it is assisted in its movement by means of the small wheels or rollers 02 This construction may of course be varied, and I do not Wish to limit myself to that shown herein, as this illustration is given merely'for the purpose of showing how the trolley may be passed under ICO downward the same retracts the arms 11 and permits the trolley-wheel c to pass into or out of engagement with the wire, as the case may be. It will also be noted that various changes may be made in the details of construction without departing from the general spirit of my invention.

Having fully described my invention, What I claim as new, and desire to secure by Letters Patent, is

A trolley comprising a fork with a shaft mounted therein, a trolley-wheel mounted on said shaft, springs arranged on said shaft and adapted to retain said trolley-wheel in a central position thereon, arms pivotally secured in the upper ends of said fork and having 

